If I want to post provided parts from a purchase order at goods receipt with the backflush function, I get the following error message although there are enough parts available at the selected storage location. It can also be ruled out that the availability control ID is preventing the posting:

Error - IFS Applications
No adequate quantity is available for part XXXX.
Assign a quantity to backflush manually via the Components button.

Does anyone know the reason and has a solution?